Spark plug



Feb. l0'. 1925. 1,525,101

C. F. WETZEL SPARK PLUG 'Filed Aug. 31. '192s ZZWZ'ZeZ Patented Feb. l0, 192V".

PATENT OFFICE.

CHARLES F. WETZEL, 0F SHERWUOD, IFtEGrN.

SPARK PLUG.

Application led August 31, 1923.

To all tu/wm t 'may concern.'

Be it known that I, CHAnLns F. TWinznn, a citizen or' the United States, residing at therwood, in the county of `Washington and State ol Uregon, have invented a new and uset'ul Spark Plug, of which the 'following is a specilication.

This invention relates to spark plugs and aims to provide novel means whereby a plurality oi' sparks may be produced at the tiring end oi' the plug, to increase the eliiciency of the engine of which the spark plug forms a part.

Another important object ot the invention is to provide a plug having a plurality of points so that when one point becomes fouled a spark may be provided through the ad-- jacent point.

t still further object of the invention is the provision or' means whereby the spark points may be adjusted to insure the proper spark.

llVith the `foregoing and other objects in view which will appear' as the description proceeds, the invention resides in the com bination and arrangement oit parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed` may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing:

Figure l is a side elevational view disclosing a spark plug constructed in accord ance with the invention.

Figure 2 is a t'ront elevational View theret, a portion or' the shell being broken away to disclose the spark points.

llei'erring to the drawing in detail, the reference character 5 designates the body portion or shell ot' the spark plug' within which is positioned the usual core (S formed oit suitable insulating material, which is held in position by means oit the securing nut P Extending through the core 6 is a central electrode 8 which is .formed with a threaded portion at its upper end to receive the nut 9, while the lower extremity thereof is threaded to receive the point supporting Serial No. 660,365.

member l0. rlhis point supporting member l0 is formed of a length of conductive material curved as clearly shown by Figure l ot the drawing and provided with a@ threaded opening to permit the same to be readily positioned over the lower threaded end ot the electrode 8.

its shown, the construction of the support l() is such as to provide a pair of parallel arms ll, the outer arm supporting the point fg'irough which acti-ic energy passes to the stationary spark point 13, which is lormed integral with the shell 5 and eX- tended inwardly, the tree end thereof lying between the lower end of the electrode 8 and the spark point l2. From the foregoing it will be obvious that due to the construction olf the support l0, the spark point 1Q may be adjusted towards and away from the stationary spark point 13 to insure the proper spark being made at the sparking end of the plug.

From the foregoing it will be obvious that a plurality oic spark points are provided and that should one of the spark points become fouled, the spark will jump between the remaining point of the plug.

lt claim:

A, spark plug including a shell, a core in the shell, an electrode carried by the core and having threaded portions beyond the ends of the core, a stationary spark point caiL ried by the shell and extending in proximity to the central electrode, a curved supporting' member having threaded members adjacent to its ends, one of said threaded openings adapted to accommodate the central electrode, to adj ustably support the curved supporting member on the central electrode, a threaded spark. point adapted to pass through the opposite threaded opening` ot the supporting member to adjusta-hly support the last mentioned threaded spark point.

In testimony that l claim the foregoing' as my own, I have hereto aiiixed my signa` ture in the presence of two witnesses.

CHA RLES F. VVFJTZEL.

W'itnesses BRUCE C. (huur. BLANCHE GAINES. 

